JP5100685B2 - Interchangeable lens digital camera - Google Patents

Description

  The present invention relates to an interchangeable lens digital camera including a digital camera body having a display unit for displaying a subject image.

  Conventionally, an interchangeable lens type digital camera in which an interchangeable lens can be attached to and detached from a digital camera body is known.

  For example, in Patent Document 1, an interchangeable lens is detachable, a camera body provided with a shutter, an interchangeable lens detection unit that detects whether the interchangeable lens is attached to the camera body, and an interchangeable lens detection unit. However, a lens-interchangeable single-lens reflex digital camera provided with shutter control means for restricting the opening / closing operation of the shutter in a state where it is detected that the interchangeable lens is released from the camera body is disclosed in Patent Document 2. An image pickup device for photoelectrically converting a subject image to obtain an electronic image signal, a signal processing circuit for signal processing the electronic image signal obtained by the image pickup device, and an image signal output from the signal processing circuit A display unit, a discriminating unit for discriminating the specification or type of the mounted lens, and a composite image to be displayed on the through image displayed on the display unit according to the discrimination result of the discriminating unit. Digital camera taking lens is interchangeable with a selection means for selecting use images is disclosed.

JP 2003-153050 A JP 2007-036983 A

  However, the conventional interchangeable lens type digital camera described above has the following problems.

  First, the interchangeable lens has a built-in drive motor for zooming adjustment and autofocus, and the drive motor is controlled by the system controller provided in the camera body. Interchangeable lenses must be prepared, and interchangeable lenses other than dedicated interchangeable lenses are hardly available. On the other hand, manual operation type interchangeable lenses that have been used for a long time have many interchangeable lenses with high lens performance, which are still famous, and this kind of interchangeable lenses hardly deteriorate. There are many requests to use such interchangeable lenses in the latest digital camera bodies. However, since manual operation type interchangeable lenses cannot use automatic adjustment, particularly autofocus, focusing becomes difficult.

  Second, when using an interchangeable lens other than a dedicated interchangeable lens, the digital camera body and the interchangeable lens are basically independent, so the digital camera body can hardly obtain information on the interchangeable lens. . Therefore, the interchangeable lens cannot be fully utilized for the digital camera body, and in particular, there is a problem that it is not possible to perform optimal shooting in flash shooting or the like.

  An object of the present invention is to provide an interchangeable lens type digital camera that solves the problems existing in the background art.

  In order to solve the above-described problems, the present invention provides a digital camera main body 2 when configuring an interchangeable lens digital camera 1 including a digital camera main body 2 having a display unit (3a, 3b) for displaying a subject image A. A partially enlarged display function unit Fe for enlarging and displaying a part Ap of the subject image A displayed on the display unit (3a, 3b), and a digital camera body 2 or a mount adapter attached to and detached from the digital camera body 2 11, the rotation of the focus ring 5 in the manual operation type interchangeable lens 4 having the focus ring 5 for performing focusing by rotating with a hand attached to the digital camera body 2 or the mount adapter 11. Detects the position of the back cam 5c that moves forward and backward in the optical axis direction of the lens barrel 71 in response to the dynamic displacement And a detection function unit Fd having a displacement detection unit 6 that detects at least the presence or absence of rotational displacement of the focus ring 5, and expansion by detection of rotational displacement by the displacement detection unit 6 A control function unit Fc that performs display and cancels enlarged display when no rotational displacement is detected is provided.

  In this case, according to a preferred aspect of the invention, the display unit (3a, 3b) can include the viewfinder unit 3a and / or the monitor display unit 3b. The detection function unit Fd can be provided with a distance detection unit 13 that obtains distance data Dw related to the distance to the subject based on the position of the focus ring 5 detected by the position detector 12, and the distance data Dw is It can be used for distance display and / or strobe control based on distance. Furthermore, the detection function unit Fd can be provided with a function of enabling non-detection after a certain delay time Tr has elapsed with respect to non-detection of the rotational displacement of the focus ring 5. In addition, the detection function unit Fd is provided with a displacement speed detection function for detecting the rotational displacement speed Vr of the focus ring 5, and the enlarged display function unit Fe can be enlarged and displayed with a plurality of enlargement magnifications. In addition to providing a display function, the control function unit Fc may be provided with a magnification changing function for reducing the enlargement magnification when the rotational displacement speed Vr is fast and increasing the enlargement magnification when the rotational displacement speed Vr is slow. it can. On the other hand, the digital camera main body 2 is provided with a contrast-type focus adjustment function, and by utilizing the change in the focus adjustment contrast signal in the focus adjustment function, the state during operation of the focus ring 5 is changed to a plurality of marks 14p, A focus aid display function unit Ff for displaying on the display units 3a and 3b by lighting control of 15 and 14q can be provided.

  According to the interchangeable lens type digital camera 1 according to the present invention having such a configuration, the following remarkable effects can be obtained.

  (1) Even when an old manual operation type interchangeable lens 4 that is said to be a famous device is attached to the latest digital camera body 2 of an arbitrary manufacturer, the focus ring 5 in the interchangeable lens 4 can be operated. Since the partial enlargement display function unit Fe in the digital camera body 2 is controlled in conjunction with it, focusing using the partial enlargement display function unit Fe can be performed easily and reliably.

  (2) Since the mount adapter 11 for attaching and detaching the interchangeable lens 4 to / from the digital camera body 2 by interposing between the manually operated interchangeable lens 4 and the digital camera body 2 is used, the combination of the interchangeable lens 4 and the digital camera body 2 is used. In addition, since the parts to be added to the digital camera body 2 side can be arranged on the mount adapter 11, the digital camera body 2 side can be implemented only by software changes. For example, the implementation can be facilitated.

  (3) The back cam 5c disposed on the detection function unit Fd and mounted on the mount adapter 11 or the digital camera body 2 and moved forward and backward in the optical axis direction of the lens barrel 71 corresponding to the rotational displacement of the focus ring 5 Since the position detector 12 for detecting the position is provided, the position and speed (differentiation of the position) of the focus ring 5 can be detected easily and reliably. In particular, when the mount ring 11 is provided, the position detector 12 is provided. It is possible to increase the degree of freedom in selecting and arranging the types of the above.

  (4) According to a preferred embodiment, when the detection function unit Fd is provided with the distance detection unit 13 that obtains the distance to the subject (distance data Dw) based on the position of the focus ring 5 detected by the position detector 12, The absolute value distance can be easily obtained.

  (5) If the distance data Dw is used for displaying the distance and / or controlling the strobe based on the distance according to the preferred embodiment, the absolute value distance to the subject can be used. The functionality can be enhanced.

  (6) If the detection function unit Fd is provided with a function for enabling the non-detection after a certain delay time Tr has elapsed with respect to the non-detection of the rotational displacement of the focus ring 5 according to a preferred aspect, the focus Since it is possible to cancel a short stoppage of rotation during the operation of the ring 5, the focus can be adjusted stably and smoothly, and the usability and convenience can be further improved.

  (7) According to a preferred embodiment, the detection function unit Fd is provided with a displacement speed detection function for detecting the rotational displacement speed Vr of the focus ring 5, and the partially enlarged display function unit Fe is enlarged at a plurality of magnifications. In addition to providing a displayable enlargement display function, the control function unit Fc has a magnification change that reduces the enlargement magnification when the rotational displacement speed Vr is fast and increases the enlargement magnification when the rotational displacement speed Vr is slow. If a function is provided, focusing can be performed more easily and reliably, and can be performed quickly.

  (8) According to a preferred embodiment, the digital camera main body 2 is provided with a contrast-type focus adjustment function, and a change in the focus adjustment contrast signal in the focus adjustment function is used, thereby operating the focus ring 5. If the focus aid display function unit Ff for displaying the image on the display unit (3a, 3b) by lighting control of the plurality of marks 14p, 15, 14q is provided, it can be used as an auxiliary display for the enlarged display by the partially enlarged display function unit Fe. Therefore, for example, even a photographer with weak visual acuity can easily and surely focus, and the convenience can be further improved.

Block diagram of an electrical system in an interchangeable lens digital camera according to a preferred embodiment of the present invention, External side view showing a state in which the interchangeable lens is detached from the digital camera body in the interchangeable lens type digital camera, External side view showing a state in which an interchangeable lens is mounted on the digital camera body in the interchangeable lens type digital camera, Display screen diagram of the display unit in the interchangeable lens type digital camera, Timing chart for explaining the operation of the interchangeable lens type digital camera, Flow chart for explaining the operation of the interchangeable lens type digital camera, The block diagram of the displacement detection part in the interchangeable lens type digital camera which concerns on the change embodiment of this invention, The external appearance side view which shows the state which removed the interchangeable lens from the digital camera main body in the interchangeable lens type digital camera which concerns on other modified embodiment of this invention,

  Next, preferred embodiments according to the present invention will be given and described in detail with reference to the drawings.

  First, the configuration of the interchangeable lens digital camera 1 according to the present embodiment will be described with reference to FIGS.

  As shown in FIGS. 2 and 3, the digital camera 1 includes a relatively small viewfinder unit (display unit) 3a for displaying a subject image A (FIG. 4) and a relatively large monitor display unit (display unit) 3b. A single-lens reflex digital camera body 2 having The front surface 2f of the digital camera body 2 has a camera side mount portion 61 including a plurality of latching claws to which the interchangeable lens is attached and detached. The camera side mount portion 61 is connected to a mount adapter 11 described later. The interchangeable lens 4 can be attached and detached. The front surface 2f of the digital camera body 2 is provided with a lock release button 62 for releasing the lock when the mount adapter 11 is attached to the camera side mount 61, and the camera side mount 61 has the interchangeable lens 4 side. The circuit connection part 63 which performs a connection with the electric system circuit provided for is provided. In addition, the digital camera body 2 is equipped with general equipment in a digital camera such as a hot shoe 64 and a mode dial 65 that appear in FIG. 2 and a shutter button that does not appear in the figure.

  For example, an interchangeable lens 4 having high lens performance, which is still known as a famous device, can be attached (detached) to the digital camera body 2. Usually, this type of interchangeable lens has many manual operation types, and the exemplified interchangeable lens 4 is also provided with a zooming ring 72 for adjusting zooming by turning by hand, and focusing by turning by hand. This is a manual operation type provided with a focus ring 5. Reference numeral 5 c denotes a rear cam that protrudes rearward from the rear end of the lens barrel 71 and moves forward and backward in the axial direction of the lens barrel 71 in response to the turning operation of the focus ring 5. The illustrated back cam 5c is of a type that is formed on the end face by a plane cut and that moves forward and backward while rotating according to the rotational displacement of the focus ring 5. The interchangeable lens includes a type in which the back cam 5c moves forward and backward without rotating and a type in which a part is formed as an inclined surface. In either case, the back cam moves forward and backward in the axial direction. Further, the rear end of the lens barrel 71 has a lens side mount portion 73 including a plurality of locking claws.

  On the other hand, 11 is a mount adapter, which is formed in a ring shape as a whole. The mount adapter 11 has a front mount portion 81 including a plurality of locked claws to be attached to and detached from the lens side mount portion 73 on the front surface, and a plurality of locking claws to be attached to and detached from the camera side mount portion 61 on the rear surface. A rear mount portion 82 including The mount adapter 11 is an adapter that is interposed between the digital camera body 2 and the interchangeable lens 4 to attach (detach) the interchangeable lens 4 to / from the digital camera body 2. Therefore, the form of the front mount part 81 matches the form of the lens side mount part 73, and the form of the rear mount part 82 matches the form of the camera side mount part 61. Further, the mount adapter 11 includes a circuit connection portion 83 for connecting to the circuit connection portion 63 provided in the digital camera body 2, and when the lens side mount portion 73 of the interchangeable lens 4 is attached to the front mount portion 81. Is provided with an unlock lever 84 for releasing the lock. In this way, if the mount adapter 11 that attaches and detaches the interchangeable lens 4 to / from the digital camera body 2 by interposing it between the interchangeable lens 4 and the digital camera body 2 is used, the combination of the interchangeable lens 4 and the digital camera body 2 is greatly improved. Can be enlarged.

  Further, the mount adapter 11 is provided with a position detector 12 for detecting the position of the rear cam 5c provided in the interchangeable lens 4 when the front mount portion 81 is attached to the lens side mount portion 73. This position detector 12 is connected to the circuit connection unit 83. The position detector 12 may be an electric type, a magnetic type, an optical type, a mechanical type as long as it can detect the position of the rear cam 5c, particularly the position of the rear end portion of the rear cam 5c in the axial direction (front-rear direction). The detection principle does not matter. FIG. 1 shows an example of a position detector 12 that detects magnetically using a yoke 12y and a detection coil 12c. The position detector 12 constitutes a part of the detection function unit Fd. If such a mount adapter 11 is used, even parts originally added to the digital camera body 2 side can be arranged on the mount adapter 11, so the digital camera body 2 side is implemented only by software changes. This makes it easier to implement. Further, if such a position detector 12 is provided, the position and speed (differential position) of the focus ring 5 can be detected easily and reliably, and the position detector 12 is provided by being mounted on the mount adapter 11. It is possible to increase the degree of freedom in selecting and arranging the types of the above.

  On the other hand, FIG. 1 shows an electric block circuit of the digital camera body 2. A system controller 22 includes a system controller main body 22o having a computer function including a CPU and a program memory, and a system memory 22m including an image memory. Reference numeral 23 denotes a CCD serving as an image sensor for photographing a subject, which is connected to an image input port of the system controller main body 22o via an analog-digital converter (A / D) 24. On the other hand, 3a is a viewfinder unit using a small liquid crystal panel for displaying the above-described subject image A, and is connected to the display output port of the system controller main body 22o via the display driver 25a, and 3b is the same subject image A. Is a monitor display unit using a liquid crystal panel, and is connected to a display output port of the system controller main body 22o via a display driver 25b. A strobe (light emitting unit) 27 is connected to a strobe control port of the system controller main body 22o via a strobe driver 26, and 28 is a card slot, which is connected to the system controller main body 22o. A memory card can be set in the card slot 28. The above is the basic circuit of the electric system in the digital camera body 2.

  Further, the detection processing unit 31 that processes the detection signal from the position detector 12 applied to the system controller 22 via the circuit connection unit 63 described above and applies the processed signal to the system controller main body 22o. Is provided. The detection processing unit 31 includes a displacement detection unit 6 that detects the presence or absence of the rotational displacement of the focus ring 5 in the interchangeable lens 4 and relates to the distance to the subject based on the position of the focus ring 5 detected by the position detector 12. A distance detection unit 13 for obtaining the distance data Dw is provided. If such a distance detector 13 is provided, the absolute distance to the subject can be easily obtained. In this case, the detection processing unit 31 and the position detector 12 constitute a detection function unit Fd. Further, the detection function unit Fd has a function of enabling non-detection after a certain delay time Tr has elapsed with respect to non-detection of the rotational displacement of the focus ring 5. If such a function is provided, a short stoppage of rotation during the operation of the focus ring 5 can be canceled, so that stable and smooth focusing can be performed. it can.

  On the other hand, as shown in FIG. 4, the system controller main body 22o includes a partially enlarged display function unit Fe that enlarges and displays a part Ap of the subject image A displayed on the viewfinder unit 3a and the monitor display unit 3b. A control function unit Fc that performs enlarged display by detecting the rotational displacement of the focus ring 5 (advance and retreat displacement of the back cam 5c) by the displacement detector 6 and cancels the enlarged display by not detecting the rotational displacement is provided. The detection function unit Fd is provided with a displacement speed detection function for detecting the rotational displacement speed Vr of the focus ring 5, and the enlarged display capable of being enlarged and displayed at a plurality of enlargement magnifications on the partially enlarged display function unit Fe. In addition to having a function, the control function unit Fc includes a magnification changing function for reducing the enlargement magnification when the rotational displacement speed Vr is fast and increasing the enlargement magnification when the rotational displacement speed Vr is slow. Thereby, focusing can be performed more easily and reliably, and can be performed quickly.

  Next, the usage method of the digital camera 1 according to the present embodiment and the function of each part associated therewith will be described according to the flowchart shown in FIG. 6 with reference to FIGS.

  First, a method for attaching (detaching) the interchangeable lens 4 to / from the digital camera body 2 will be described. First, as shown in FIG. 2, a manual operation type interchangeable lens 4 and a mount adapter 11 for attaching the interchangeable lens 4 to the digital camera body 2 are prepared. Then, when the rear mount portion 82 of the mount adapter 11 is pressed against a fixed position in the mount portion 61 of the digital camera body 2 and is rotated and displaced to a lock position having a certain angle, the locking claw on the mount adapter 11 side is digitally It is locked to the locked portion on the camera body 2 side, and the locking is automatically locked. In order to release the lock, the lock release button 62 of the digital camera body 2 may be pressed. Next, when the mount portion 73 of the interchangeable lens 4 is pressed against a fixed position on the front mount portion 81 of the mount adapter 11 and rotated to a lock position having a fixed angle, the latching claw on the interchangeable lens 4 side becomes the mount adapter. It is locked to the locked portion on the 11th side, and the locking is automatically locked. In order to release the lock, the lock release lever 84 of the mount adapter 11 may be pushed. Thus, by using the mount adapter 11, various interchangeable lenses 4... Can be easily and reliably attached to the digital camera body 2, and when attached, the circuit connection portion of the mount adapter 11. 83 and the circuit connection part 63 of the digital camera body 2 are connected. The digital camera 1 with the interchangeable lens 4 attached to the digital camera body 2 is shown in FIG.

  Next, a method of using the digital camera 1 (photographing method) will be described. First, in the digital camera body 2, an automatic shooting mode is selected (step S1). Thereby, the aperture is prioritized and the shutter speed is automatically set. On the other hand, since the interchangeable lens 4 does not have an autofocus function, the photographer needs to perform focusing. Assume that the photographer selects a subject to be photographed and points the digital camera 1 in that direction (step S2). As a result, the subject image A is displayed on the viewfinder unit 3a (same for the monitor display unit 3b). The display in this case is a normal display in which the subject image A is displayed as it is (step S3).

  Then, the photographer can focus while looking at the subject image A of the viewfinder unit 3a. In this case, when the photographer rotates the focus ring 5, the back cam 5 c moves forward and backward in the axial direction corresponding to the rotational displacement of the focus ring 5. On the other hand, this forward / backward displacement is detected by the position detector 12 in the detection function unit Fd. As a result, a position detection signal Sx is output from the position detector 12, and this position detection signal Sx is applied to the detection processing unit 31 via the circuit connection units 83 and 63. In the detection processing unit 31, the displacement detection unit 6 detects the presence / absence of a back and forth displacement in the axial direction of the back cam 5c (steps S4 and S5). In this case, since the differential signal obtained by differentiating the position detection signal Sx with respect to time corresponds to the rotational displacement speed (speed data) Vr of the focus ring 5, the magnitude of the speed Vr (differential signal) is monitored. Thus, it is possible to determine the presence or absence of the back and forth displacement of the back cam 5c (the rotational displacement of the focus ring 5). That is, if the speed Vr is 0, there is no rotational displacement, and if it is not 0, there is rotational displacement. Thus, the presence or absence of the rotational displacement of the focus ring 5 can be easily detected. On the other hand, when it is detected that there is a rotational displacement, a displacement detection signal Dd is output from the detection processing unit 31, and this displacement detection signal Dd is given to the system controller body 22o.

  In the system controller main body 22o, the partial enlargement display function unit Fe is enlarged and displayed by controlling the partial enlargement display function unit Fe by the control function unit Fc (step S6). That is, as shown in FIG. 4, the partially enlarged display function unit Fe enlarges a portion Ap of the subject image A displayed on the viewfinder portion 3a as an enlarged image and displays the enlarged image on the subject image A. I do. Since the image blur is enlarged by this enlarged display, the photographer can easily focus. Then, when focus is achieved, the shutter button may be pressed (steps S7 and S8). By the way, when focusing, usually the photographer repeatedly rotates the focus ring 5 in the left-right direction, so that the enlarged display is continued as long as the rotation is performed (steps S7, S4, S5...). However, if the turning operation is stopped, the rotational displacement is not detected, so that the enlarged display is canceled and the normal display in which the original subject image A without the enlarged display is displayed is restored (steps S7, S4, S3). .

  FIG. 5 specifically shows a signal processing state when the focus ring 5 is turned and operated. In the case of illustration, the detection function unit Fd has a displacement speed detection function for detecting the rotational displacement speed Vr of the focus ring 5 and can be enlarged and displayed on a partially enlarged display function unit Fe at a plurality of magnifications. Implementation having a display function and a control function unit Fc having a magnification changing function for reducing the enlargement magnification when the rotational displacement speed Vr is fast and increasing the enlargement magnification when the rotational displacement speed Vr is slow. The form is shown. In the figure, ts is the time when the rotation operation of the focus ring 5 is started, Vr is a speed (position differential signal) obtained from the position detection signal Sx, Vru is a magnification switching judgment value during right rotation, and Vrd is during left rotation. A magnification switching judgment value, Ts indicates a delay time for enabling the switching at the time of magnification switching, and Tr indicates a delay time for enabling the switching at the time of canceling the magnification.

  If the focus ring 5 is turned and operated from the time point ts, the magnification switching determination value Vru is reached at the time point t1, so that the enlarged display Apa is performed with the first enlargement magnification having a relatively small enlargement magnification. Since the time point t1 has elapsed and the operation is performed at a relatively high speed Vr until the time point t2, the enlarged display Apa is maintained. In this case, there is a period smaller than the magnification switching determination value Vru (Vrd) between the time t1 and the time t2, but since it is shorter than the set delay time Ts, the magnification switching determination value Vru (Vrd) is effective. Don't be. On the other hand, since the speed Vr after the time point t2 becomes equal to or smaller than the magnification switching determination value Vru (Vrd), the enlarged display with the second magnification ratio having a relatively large magnification ratio at the time point t3 when the delay time Ts has elapsed from the time point t2. Apb is performed. Therefore, accurate focusing can be performed at a slower rotation speed Vr. Further, t4 indicates a point in time when focus is achieved. Thus, after the time point t4 has elapsed, the turning operation is stopped, so that the enlarged display is released at the time point t5 when the delay time Tr has elapsed from the time point t4. As a result, the subject image A without the enlarged display is displayed as it is on the viewfinder unit 3a, so that the photographer only has to confirm the entire location and press the shutter button. t6 indicates a point in time when the shutter button is pressed.

  As described above, according to the digital camera 1 according to the present embodiment, an old manual operation type interchangeable lens 4 referred to as a masterpiece is attached to the latest digital camera body 2 of an arbitrary manufacturer. However, since the partially enlarged display function unit Fe in the digital camera body 2 can be controlled in conjunction with the operation of the focus ring 5 in the interchangeable lens 4, focusing using the partially enlarged display function unit Fe can be performed easily and reliably. It can be carried out.

  Next, other various functions will be described. Since the position detection signal Sx is given from the position detector 12 to the detection processing unit 31 in the detection function unit Fd, the distance detection unit 13 can obtain the absolute value distance (distance data Dw) to the subject. That is, since a position detection signal Sx corresponding to the position of the focus ring 5 (rear cam 5c) is obtained, the absolute value distance to the subject corresponding to the magnitude of the position detection signal Sx can be set in advance as a conversion database. For example, when the position detection signal Sx is obtained, the conversion database can be used to perform conversion processing to an absolute value distance to the subject. Thus, the absolute value distance (distance data Dw) to the subject can be easily obtained by the position detection signal Sx corresponding to the position of the focus ring 5 (rear cam 5c).

  Therefore, by providing the obtained distance data Dw to the system controller main body 22o, the distance display and the strobe control based on the distance can be performed. Since the distance data Dw is an absolute distance to the subject, for example, as shown in FIG. 4, the distance display Ax (for example, 30 m) can be performed in the viewfinder unit 3a. The distance data Dw can also be used for controlling the strobe. That is, the light emission amount of the strobe is controlled using the absolute value distance to the subject. Thus, if the distance detection unit 13 is provided in the detection function unit Fd, the absolute value distance to the subject can be easily obtained. In addition, since the obtained distance data Dw can be used for distance display and strobe control based on the distance, the functionality can be further enhanced, for example, optimal shooting can be performed particularly in flash shooting. .

  On the other hand, the digital camera body 2 is provided with a contrast-type focus adjustment function as a focus adjustment method, and the state at the time of operating the focus ring 5 by utilizing the change of the focus adjustment contrast signal in the focus adjustment function. Is provided with a focus aid display function unit Ff for displaying on the viewfinder 3a by lighting control of the plurality of marks 14p, 15, 14q. The focus adjustment function using the contrast method can read whether the focus ring 5 is positioned in the up direction, the neutral position, or the down direction in the contrast curve based on the turning operation of the focus ring 5. In this case, the neutral position is a focused position. Therefore, the focus adjustment contrast signal is read, and in the up direction, the right arrow mark 14p shown in FIG. 4 is lit or blinks in red or the like, and in the down direction, the left direction shown in FIG. The arrow mark 14q can be turned on or blinked in red or the like. In addition, the circle mark displayed at the center can be lit or blinked in green or the like at the neutral position in focus. If such a focus aid display function unit Ff is provided, it can be used as an auxiliary display for this enlarged display in addition to the enlarged display by the partially enlarged display function unit Fe. Even in such a case, the convenience can be further enhanced, such as being able to focus easily and reliably.

  Next, a modified embodiment of the digital camera 1 according to the present invention will be described with reference to FIGS.

  FIG. 7 shows a modified embodiment of the position detector 12. The position detector 12 described above has exemplified the case of magnetic detection using the yoke 12y and the detection coil 12c. FIG. 7 shows a follower roller 12r, a lever 12b that rotatably supports the follower roller 12r at the tip, and A position detector 12 constituted by an angle detector 12d for rotatably supporting the rear end of the lever 12b and detecting the rotation angle of the rear end of the lever 12b is shown. As described above, the position detector 12 may be of any type as long as it has a function of detecting the position of the back cam 5c. In addition, in FIG. 7, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals to clarify the configuration, and detailed description thereof is omitted.

  FIG. 8 shows a modified embodiment in which the mount adapter 11 is not used. In this case, the function of the mount adapter 11 is provided in the digital camera body 2 as it is. Specifically, the configuration of the camera-side mount 61 is matched to the configuration of the lens-side mount 73, and the camera-side mount 61 is attached to a plurality of objects to be attached and detached by a plurality of locking claws of the lens-side mount 73. Provide locking claws. Further, a position detector 12 that detects the rear end position of the rear cam 5c is disposed in the vicinity of the camera-side mount 61 and inside the digital camera body 2. As described above, when the mount adapter 11 is not used, it is necessary to change the design of the digital camera body 2 so as to correspond to the interchangeable lens 4, but the interchangeable lens 4 is directly attached (detached) to the digital camera body 2. can do. In addition, in FIG. 8, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals to clarify the configuration, and detailed description thereof is omitted.

  The preferred embodiment (modified embodiment) has been described in detail above. However, the present invention is not limited to such an embodiment, and the present invention is not limited to the detailed configuration, shape, material, quantity, technique, and the like. Any change, addition, or deletion can be made without departing from the scope of the above.

  For example, although the displacement detection unit 6 and the distance detection unit 13 have shown the case where the position detection signal Sx obtained from the position detector 12 is used, the displacement detection unit 6 and the distance detection unit 13 each have a purpose corresponding to the purpose. Two dedicated position detectors 12 may be used. In addition, the magnification changing function is shown in which two different magnifications are set to reduce the enlargement magnification when the rotational displacement speed Vr is fast and increase the enlargement magnification when the rotational displacement speed Vr is slow. The magnification may be one, or three or more.

  As long as the interchangeable lens digital camera 1 according to the present invention includes a digital camera body 2 having a display unit (3a, 3b) for displaying a subject image A, not only a single-lens reflex type but also various types of digital cameras. It can be used for the main body. The interchangeable lens 4 is not limited to a specific type, and can be used for various types of interchangeable lenses.

  DESCRIPTION OF SYMBOLS 1: Interchangeable lens type digital camera, 2: Digital camera main body, 3a: Display part (viewfinder part), 3b: Display part (monitor display part), 4: Interchangeable lens, 5: Focus ring, 5c: Back cam, 6 : Displacement detector, 11: mount adapter, 12: position detector, 13: distance detector, 14p: mark, 14q: mark, 15: mark, 71: lens barrel, Fe: partially enlarged display function unit, Fd : Detection function unit, Fc: control function unit, Ff: focus aid display function unit, Dw: distance data, A: subject image, Ap: part of subject image, Tr: delay time, Vr: speed of rotational displacement

Claims (7)

  In an interchangeable lens type digital camera having a digital camera body having a display unit for displaying a subject image, a partially enlarged display function for enlarging and displaying a part of the subject image displayed on the display unit by being provided in the digital camera body And a focus ring that performs focusing by rotating with a hand attached to the digital camera body or the mount adapter by being disposed on the digital camera body or the mount adapter attached to and detached from the digital camera body. A position detector for detecting a position of a back cam that moves forward and backward in the optical axis direction of the lens barrel in response to the rotational displacement of the focus ring in a manually operated interchangeable lens having at least one of the focus rings Has a displacement detector that detects the presence or absence of rotational displacement And a control function unit that performs the enlarged display by detecting the rotational displacement by the displacement detection unit and cancels the enlarged display by non-detection of the rotational displacement. Lens type digital camera.   2. The interchangeable lens digital camera according to claim 1, wherein the display unit includes a viewfinder unit and / or a monitor display unit.   The interchangeable lens type according to claim 1, wherein the detection function unit includes a distance detection unit that obtains distance data related to a distance to a subject based on the position of the focus ring detected by the position detector. Digital camera.   4. The interchangeable lens type digital camera according to claim 3, wherein the distance data is used for displaying a distance and / or controlling a strobe based on the distance.   The said detection function part is provided with the function which waits for progress of a fixed delay time with respect to the non-detection of the rotation displacement of the said focus ring, and makes the said non-detection effective. Interchangeable lens digital camera.   The detection function unit includes a displacement speed detection function that detects a rotational displacement speed of the focus ring, and the partial enlargement display function unit includes an enlargement display function that can perform enlargement display with a plurality of enlargement magnifications. The control function unit includes a magnification changing function that reduces the magnification when the rotational displacement speed is high and increases the magnification when the rotational displacement speed is slow. The interchangeable lens type digital camera according to any one of claims 1 to 5.   The digital camera body has a contrast type focus adjustment function, and by using a change in the focus adjustment contrast signal in the focus adjustment function, the state at the time of operating the focus ring is controlled by lighting control of a plurality of marks. The interchangeable lens type digital camera according to claim 1, further comprising a focus aid display function unit for displaying on the display unit.

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